docs: update PrismaClient initialization for v7 mandatory driver adapters (#7804)

* Enhance PrismaClient setup with adapter and requirements

Updated PrismaClient initialization to include adapter support and added Prisma 7 connection requirements.

* Update apps/docs/content/docs/orm/index.mdx

Adding suggestions from coderabbitai, resolving the minor issue.

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

* Update database adapter to use PrismaPg for PostgreSQL

---------

Co-authored-by: coderabbitai[bot] <136622811+coderabbitai[bot]@users.noreply.github.com>

Author: DaveAdbeel

apps/docs/content/docs/orm/index.mdx

@@ -115,8 +115,14 @@ npx prisma generate
 
 ```ts
 import { PrismaClient } from "./generated/client";
+// Import the driver adapter for your specific database (example uses PostgreSQL)
+import { PrismaPg } from "@prisma/adapter-pg";
 
-const prisma = new PrismaClient();
+// Initialize the adapter according to your driver's requirements
+const adapter = new PrismaPg({ connectionString: process.env.DATABASE_URL });
+
+// Pass the adapter instance to PrismaClient
+const prisma = new PrismaClient({ adapter });
 
 // Find all users with their posts
 const users = await prisma.user.findMany({
@@ -133,6 +139,20 @@ const user = await prisma.user.create({
   },
 });
 ```
+:::note
+
+### Prisma 7 Connection Requirements
+Starting with **Prisma 7**, providing a [driver adapter](/orm/core-concepts/supported-databases/database-drivers) is mandatory for direct database connections. This change standardizes database connectivity across Node.js, Serverless, and Edge environments.
+
+If you use Prisma Accelerate, instantiate Prisma Client with `accelerateUrl` and the Accelerate extension instead of a driver adapter.
+
+To ensure compatibility:
+* **Install an adapter:** Use the specific package for your database (e.g., `@prisma/adapter-pg`, `@prisma/adapter-mysql`, etc.).
+* **Enable ESM:** Your `package.json` must include `"type": "module"`.
+
+For detailed instructions, see the [V7 Upgrade Guide](/guides/upgrade-prisma-orm/v7).
+
+:::
 
 ## Next steps